FOURIER TRANSFORM - INFRARED SPECTROPHOTOMETER FOR AIR MONITORING

摘要

Compounds can be classified by infrared spectroscopy through the variation of their transmittance, reflectance or emittance with frequency. At the present time, measurement of the transmittance spectrum of a sample is the usual means of identifying a material; reflectance spectroscopy is used infrequently while emission spectra are hardly ever measured. One of the principal reasons for the unpopularity of infrared emission spectroscopy is the experimental difficulties involved, especially when the sample is only able to be heated to very slightly above room temperature. In this case the energy at the detector is very low compared to the energy from the incadescent sources used in absorption or reflection spectroscopy, so that instrumental sensitivity limited the applications of the technique until the development of Fourier transform spectroscopy. In this paper we outline the application of virtual commands, by means of a pannel, to be applied in order to broad the use of a FT-IR spectrophotometer to characterize compounds.